斜拉桥减震控制研究

对于采用飘浮体系的斜拉桥,主桥在地震作用下将产生较大的纵向位移,必须加以控制才能保证桥梁的抗震安全性,本文探讨了采用弹性连接装置减震和采用粘滞阻尼器不同的布置方式减震,对3种减震方案进行了参数敏感性分析。分析表明,只要选择合理的参数,3种减震方案均能较好地控制主桥在地震作用下的纵向位移,但同时在塔、梁和梁与辅助墩之间设置阻尼器的方案最优。

Research on Seismic Response Control for Long Span Cable-Stayed Bridge

Since cable-stayed bridge often produce large displacement under a strong earthquake,the suitable devices should be employed to control the displacement for the seismic safety of the bridge.In this paper,elastic link device and viscous damper are both used for reduction of seismic response, The parameter sensitivity study on the three types for reduction of seismic response is carried on.The analysis indicates that both of the three methods with rational parameters may reduce the seismic displacement significantly,but the damper setting in tower and main beam and pier and main beam is better.